<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title></title>
	</head>
	<body>
		<canvas id="canvas1"></canvas>
		<script type="text/javascript">
			var canvas1 = document.getElementById('canvas1');
			var ctx1 = canvas1.getContext('2d');
			ctx1.strokeStyle = "rgb(200,0,0)";
			ctx1.beginPath();
			//ctx1.arc(75,75,30,1.6,0,false);
			//ctx1.stroke();
			ctx1.fillStyle = "rgba(200,0,0,0.6)";
			ctx1.arc(150,75,30,1,2.1,false);
			ctx1.fill()
		</script>
	</body>
</html>